Born: 3042 AD in Germanicus (modern Germany)
Age: 21
Ranking: 8=3 "Magister, Order of the Magi"
Power: Wires that seal and control a victim's action and perception; He is also an expert on "Lost Technology", which is very rare in Trinity Blood universe.
Codename: Marionettenspieler (German for "Puppeteer")
Other name: Dean Butler (fake name used to disguise him as Isaak's brother)

Also known as the Puppet Master, he has the ability to control bodies of both human beings and vampires alike, even if the person has already died. Unlike most members of his order, he is a Terran (human), and believes that his involvement with the Rosenkreuz Orden has a great purpose for the world.

Dietrich was born in a province in Germanicus, the son of a landowner. At very young age, he was able to display his unusual intelligence, to the point that it scared the people of his town. He was not treated as a genius, but rather as a monster.

When Dietrich was six, his father tried to kill him because he grew scared of the little boy's apparent potential for evilness. He was unsuccessful, however as Dietrich was able to kill his entire family at the age of 6.

He used his father's lands to collect people from his own town and use them as his toys. He experimented on them and killed them.

When Dietrich was 7, Cain and Isaak visited his town by coincidence. When Dietrich saw Cain, Dietrich was amazed at the tremendous power that Cain possesses. This was the first time in his life that he found someone who is far more powerful than he is. Cain is a being that has surpassed good and evil, hence he became an element of pure destruction. At this time, Cain and Isaak already seized control of the ROSENCREUZ. Dietrich joined the Orden and at the age of 10, he was already in a high ranking position.

Perhaps the encounter with Cain and Isaak had given the boy a purpose for his life, as he was rather aimless at the beginning. Dietrich is innocent, but evil. That is why he makes a formidable enemy of Abel and Esther.

To him, trust, love, friendship and loyalty do not exist, and he therefore goes on without these, alone. He sees people as his toys. He is intrigued by Esther and Abel because they are complete opposites of him. It's not unusual for a devil to pose as the bringer of light.